NFI Exam Review (latest update) questions and answers graded A+

NFI Exam Review (latest update) questions and
answers graded A+
1. Combustion Air, Fuel, Heat
Re-
quirements (3)
Water vapor, carbon dioxide, heat, and noncombustible ashes
2. Complete
Com- bustion
Produces (4)
carbon monoxide, hydrocarbons, and other gases
3. incomplete
com- bustion
produces (3)
the amount of available air
4. rate at which
fuel burns is
con- trolled by
critical factor in obtaining optimum fuel combustion
5. air to fuel
ratio is a

6. BTU British Thermal Unit, The amount of energy needed to heat one pound
of water one degree Fahrenheit

7. wood ignites at 450-550 F

8. natural gas ignit- er temp
ig- nites at

9. propane
ignites at

10. electric
spark temp

11. hot surface
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,NFI Exam Review (latest update) questions and
answers graded A+
1,150 F


920-1120 F


1,700 F


2,400 F




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,NFI Exam Review (latest update) questions and
answers graded A+

12. butane 3,200 F
lighter
temp

13. stick match temp 3,000 F

14. cigarette temp 500-800 F

15. For complete tion happens_(4
combustion: things) are re- leased
air is % oxy-
gen + %
ni- trogen

16. for com-
plete
combus-
tion, (QTY)
molecules of
(PART)
need to be
mixed with
(QTY)
molecule of
(PART)
in the
presence of
(PART)

17. When com-
plete
combus-
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,NFI Exam Review (latest update) questions and
answers graded A+
20 : 80




2 oxygen : 1 fuel : heat


heat, carbon dioxide (C02), water vapor (H20), and nitrogen (N)

18. it mixes with blood and reduces oxygen carrying capacity




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